1. Film Forming Characteristics of Oil-in-Water Emulsion with Super-Low Oil Concentration
- Author
-
Xinchun Lu, T. Zhu, Dan Guo, Shuhai Liu, Liran Ma, Chenhui Zhang, J.B. Ma, and Jianbin Luo
- Subjects
Oil in water ,Materials science ,Emulsion ,Particle-size distribution ,Lubrication ,Oil concentration ,Tribology ,Lubricant ,Composite material ,Contact area - Abstract
The oil in water emulsion has been widely used in many fields such as rolling operations. The mechanism and characteristics of film forming have been widely investigated before. However, the mechanism is still dubious and film forming characteristics are seldom discussed under an oil concentration of 0.05%. In this paper, a lubricating film testing apparatus is used to investigate the film forming characteristics and tribological behaviors under different speed of oil-in-water emulsion between a steel ball and a glass disc. By carrying out experiments under an extremely low concentration of oil, some new phenomena are found in our experiments. Oil concentration is even low to 0.0005%. The results indicate that the speed-thickness curves are changed as the condition changes. The effect of droplet size and the stability of emulsion are both considered to be important. The frictional behaviors are investigated under different conditions. The film forming mechanism of oil-in-water emulsion is also discussed by direct observations of emulsion in the contact area. A new viewpoint on the lubrication of emulsion is put forward in this paper.
- Published
- 2009